#include<iostream>
#include<algorithm>
using namespace std;
int cnt[100];
int main()
{
	int n,x;
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>x;
		cnt[x+50]++;
	}
	int flag=1;
	double count=n/2.0;
	for(int i=1;i<100;i++)
		if((double)cnt[i]>=count)
		{
			cout<<i-50<<" ";
			flag=0;
		}
	if(flag)
		cout<<"no";
    return 0;
}
